[TechAssist] Re: ptv520-ah01
- From: Vann <vannan@xxxxxxxxx>
- To: techassist <techassist@xxxxxxxxxxxxx>
- Date: Fri, 11 Feb 2005 16:22:10 -0500
Thanks for the info. it was the tube and customer does not want to put much
$$ into it. We have all heard that before
Vann
Rainbow tv
----- Original Message -----
From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, February 09, 2005 12:55 PM
Subject: [TechAssist] Re: ptv520-ah01
> I found this email in my archives. Seems like the same issue:
>
> 95 % of the time when this 2 parts fail,the cause is a bad Blue crt.The
other 5% would be a bad flyback. Replace the 2 parts again,remove the crt bd
from the blue crt and try again.If the parts do not burn up again,there is
your problem.
> Mando
>
> Kaler wrote:
>
>
> >> I have both of these projection televisions in my shop. They both came
in with sound but no raster. I subsequently found that there was no HV due
to Q906 (2SD1556) and R934 (0.33 ohm, 1/2 W, 5% metal) both being extremely
fried. This was true for both sets.
> >>
> >> I started repairs on the PR3046 first. I replaced the Q906 and the
R934 and reinstalled board. After power up both of these components
immediately failed again, with a little bit of fireworks I might add.
Obviously I have overlooked something. I have been over the main board and
power supply boards of both of these sets and can not find a problem. I
have compared flyback (T900) windings and such to a known good one that I
have and kind find no differences there.
> >>
> >> Anyone run in to this failure mode before?
> >>
> >> J. M. Kaler
> >> Kaler Electronics
> >> Benton, Kentucky
> >
> >
> HTH,
> Phil Bader
>
> Vann wrote:
>
> >Hi Techs;
> >I have a 1994 Magnavox ptv520-ah01-no print. Taking the back off and
checking r934 looks to be a .33ohm (open) and hot 2sd1556 (shorted). I
replaced both parts and removed the hv lead from splitter to flyback. tried
to turn set on and it opened r934 but did not short the HOT. Other sets I
have worked on it took out the HOT also. The #'s on flyback looks to be
364071-6 ----not sure hard to read the last No. could be a 5. Does anyone
have the correct #'s for this fly. Oh, this set had sound but no pic and I
do know about the blue tube cracks. Can an arching tube cause r934 to open
and not take out the HOT before I order a fly?? TIA
> >Vann
> >Rainbow tv
> >
>
>---------------------------------------------------------------------------
--
> >Lost Password:
> >http://www.tech-assist.org and select "Login Problems?".
> >Email Archives:
> >//www.freelists.org/archives/techassist/
> >
> >
> >
> >
>
> --
>
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: tjanphyl@xxxxxxxxxxxxxxx
>
>
>
> --
> No virus found in this outgoing message.
> Checked by AVG Anti-Virus.
> Version: 7.0.300 / Virus Database: 265.8.6 - Release Date: 2/7/2005
>
>
> --------------------------------------------------------------------------
---
> Lost Password:
> http://www.tech-assist.org and select "Login Problems?".
> Email Archives:
> //www.freelists.org/archives/techassist/
-----------------------------------------------------------------------------
Lost Password:
http://www.tech-assist.org and select "Login Problems?".
Email Archives:
//www.freelists.org/archives/techassist/
Other related posts:
